Convertible sprayer



March 14, 1944.

G. R. CARGILL 2,344,233

CONVERTIBLE SPRAYER Filed July 23, 1941 3 Sheets-Sheet 1 v A Home March 14, 1944. G. R. CARGILL 2,344,233,

CONVERTIBLE SPRAYER Filed July 25, 1941 s Sheets-Sheet '2 awyefl Jaryzii,

A ttorne Inventor March 14, 1944. .G. R. CARGILL 2,344,233

CONVERTIBLE SPRAYER Filed July 25, 1941 s Sheets -Sheet a Inventor A No m e] Patented Mar. 14, 1944 UNITED I STATES PATENT OFFICE- CONVERTIBLE ISPYIRAYER GeOrge R. Cargill, Medford, Mass.

Application July 23, 1941, Serial No. 403,727

1 Claim.

This invention relates to a convertible sprayer which can be used for various purposes, such as in road repair work for applying asphalt or heavy oil patching, tree spraying, putting out fires, sprinkling water, heating water for mixing cement in cold weather, produces steam for various purposes; etc.

The general object of the invention is to provide a tank having a flue passing therethroug-h with an oil burner extending into the flue, means for supplying air and fuel to the burner and means for supplying compressed air to the tank to place the contents thereof under pressure.

This invention also consists in certain other features of construction and in the combination and arrangement of the several parts to be hereinafter fully described, illustrated in the accompanying drawings and specifically pointed out in the appended claim.

In describing the invention in detail, reference Will be had to the accompanying drawings wherein like characters denote like or corresponding parts throughout the several views, and in which:

Figure 1 is an elevational view of the device with parts broken away.

Figure 2 is a longitudinal sectional View through the device.

Figure 3 is a section on the line 33 of Figure 2.

Figure 4 is a section on the line 4-4 of Figure 1.

Figure 5 is a fragmentary horizontal sectional view through the rear part of the device.

In these views the letter A indicates a supporting frame which is adapted to be placed On the body F of a truck or the like and this frame supports a tank T and an enclosing casing C. A flue forming pipe I passes longitudinally through the bottom of the tank and connects with a vertical part 2 which extends upwardly in front of the front end of the casing, this part 2 forming a chimney for the flue pipe. The rear end of the casing extends beyond the rear end of the tank to form a chamber 4 into which the rear end of the flue pipe extends. An oil burner B projects into the rear end of the flue pipe and is located in the chamber 4 and a fuel tank 5 is supported in the upper part of the chamber and has a filling pipe 6 extending therefrom through the top of the shell or casing. A pipe 1 extends from the fuel pipe 5 to the burner for supplying fuel and air to the burner and a valve 8 is located in this pipe. A tank 9 is supported on the frame in the casing and to one side of the tank and a pipe I0 extends from the air tank to the fuel tank and contains a check valve II and a branch pipe I2 extends from the pipe III to the burner and contains a valve I3.

Thus air and fuel are supplied to the burner and the parts within the chamber 4 are accessible through an opening in the rear of the chamber 4, said opening being covered by a door I4. A compressor I5 is supported on the frame F and is operated from any suitable movable part of the truck, suitably controlled by the driver of the truck and a pipe line I6 leads from this compressor to a pipe H which extends through the top of the casing into the top of the tank at the top thereof. A control valve I8 is located within the pipe I'I above the point of connection of the pipe I6 therewith and an extension I1 is connected with the valve and acts as a release for the pressure in the tank when the valve I8 is open. A check valve I9 is located in the line I6 adjacent the pipe I1 to prevent back pressure on the pipe I6 and said pipe I6 also containing a safety valve 20 and a gauge 2|, these parts being located outside of the casing. A branch line 22 extends from the pipe I6 through the casing to the air tank 9 and a valve 23 is located in the pipe I6 in front of the point of connection of the pipe 22 therewith. In front of the pipe 22 a gauge 24 is located in the line I6. A filling neck 25 is provided for the top of the tank and this passes through the casing and is covered by a cap 26. r

A discharge pipe 21 is connected with the lower part of the tank and extends through a side of the casing and is controlled by a valve 28, the operating rod 29 of which passes rearwardly through the rear end of the casing where it is provided with a handle 30. A door 3I covers an opening in the side of the casing so that access can be had to the discharge means.

Thus it will be seen that when the burner is in operation the products of combustion passing through the flue pipe I to the chimney 2 will heat the contents of the tank and by attaching a hose provided With a nozzle to the outlet pipe 21 and then opening the valve 28 the contents of the tank can be sprayed on objects to receive the sprays and the operation of the device can be readily controlled.

Control valves I 6 and 22' are placed in the pipes I0 and 22, respectively.

It is thought from the forego description that the advantages and novel features of the invention will be readily apparent.

It is to be understood that changes may be made in the construction and in the combinachamber through. the interior of the tank and out of said casing, a burner in said chamber extending into one end of the flue pipe, a fuel tank in said chamber connected to said burner, a blowoff pipe extending from the first tank, a blow-off control valve in the blow-off pipe, an air compressor, a pressure line connecting the compressor directly to the blow-01f pipe between the blow-off control valve and said first tank, a compressed air storage tank, a valved line from the pressure line to the storage tank, valved air connections from the storage tank to the burner and the fuel tank, a back pressure valve in the air pressure line, a pressure control valve in said pressure line between the back pressure valve and said valved line, and a pair of pressure gauges in said pressure line, one. between the back pressure valve and said valved line and the other between said storage tank and said valved line.

GEORGE R. CARGILL. 

